Sliding collar for a parasol



1.1 is a front side view of a sliding collar for a parasol showing my new design;

1.2 is a rear view thereof;

1.3 is a left side view thereof;

1.4 is a right side view thereof;

1.5 is a top view thereof;

1.6 is a bottom view thereof;

1.7 is a top, front, right side perspective view thereof; and

1.8 is a top, rear, left side perspective view thereof.

The broken line showing of a pole, ribs and screws is for the purpose of illustrating environmental structure and forms no part of the claimed design. 

CLAIM I claim the ornamental design for a sliding collar for a parasol, as shown and described. 